Reversible pulley mechanism.



No. 755,885. I PATENTED MAR,-29, 1904.

, w. H. KBSSLBR.

REVERSING PULLEY MECHANISM.

APPLIGATION FILED NOV. 1. 1902. RENEWED SEPT. 8. 1903.

R0 IODEL.

Fiy. 1.

UNITED STATES Patented March 29, 1904;.

PATENT OFFICE.

REVERSIBLE PU LLEY MECHANISM.

SPECIFICATION forming part of Letters Patent No. 755,885, dated March29, 1904. Application filed November 1, 1902. Renewed September 8, 1903.Serial No. 172,261. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM H. KESSLER, a citizen of the United States,and a resident of Passaio, in the county of Passaic and State of NewJersey, have invented certain new and useful Improvements in ReversiblePulley Mechanisms; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, making a part of this specification, in which-.

Figure 1 is a central longitudinal sectional View of a reversible pulleymechanism made according to my invention. Fig. 2 is an end view thereofas viewed from the left. Fig. 3 is a transverse sectional view taken inthe line maof Fig. 1 and as viewed from the right. Fig. 4 is atransverse sectional view taken in the line y y of Fig. 1 and as viewedfrom the right. Fig. 5 is a detail longitudinal sectional view on alarger scale. Figs. 6 and 7 are transverse sectional detail views.

This invention comprises certain new and useful combinations ofinstrumentalities hereinafter fully set forth and described, wherebyeffective provision is made for reversing the motion of a pulley withoutreversing the motion of its shaft.

A is a revoluble shaft driven by a bandwheel B or other suitable means.Loose on this shaft is a pulley C, which may be of conical contour, asshown in the drawings, or cylindric or other suitable shape. This pulleyhas a hub a, fast on the end of which isapinion 6. Adjacent to thispinion?) is an internal gear D, loose upon the shaft A, and having uponits back and integral with or otherwise fast thereto an annular flangec. Fast upon the shaft and within the range of the flange c is a splitring E, the split whereof is shown at a in Figs. 1, 3 and by k of Fig.7. This split ring E is connected with the shaft by one or more spokesd. The arrangement of this split ring E is such that when expanded, asherein presently explained, it will crowd against the inner surface ofthe flange c and be thereby clutched to the said flange, andconsequently to the gear D. Concentric with the flange c, but at asuitable distance thereis'a second split ring F. The split of this ringis shown at b in Figs. 2, 3, and 4. This second split ring F is fixed ornon-revoluble and is supported by a suitable fixture, which, as shown inFig. 1, may comprise a fixed bracket 6. Placed within this split ring Fis a continuous or unbroken ring G, which has any desired number of armsf, each of which carries the short shaft or gudgeon c of a pinion g.Each of these pinions gears atone part of its circumference with theinternal gear D and at another with the pinion 7) of the pulley C,asshown more fully in Fig. 4. While, as shown and described herein, theinternal gear D, the pinion b, and the intermediate pinions g arerepresented as toothed gears and of the spur variety, it is to beunderstood that the terms gear and pinion as herein employed areintended to include any kind of motion-transmitting mechanism properlywithin the broad meaning in theart of the said terms as, for example,friction-gearing, &c. Within the continuous ring G is placed a thirdsplit ring I, the split d of which is shown in Figs. 1 and 3. At a pointwhich should be practically midway between its ends-in other words,equidistant from its split this ring I is attached to the back of thegear D, as by a pin a in Figs. 1 and 3. The fixed split ring F,

the continuous ring G, and the third split ring I being placed onewithin another are held concentric with the shaft A, inasmuch as 4 thefixed split ring which is outermost is held stationary by its bracket orfixturee. The retention of the parts in position is also assisted to amaterial extent by the bearing of the pinions g upon the pinion I) and'upon the internal gear D, as hereinbefore set forth. When the fixedsplit ring F is contracted, it grips or clutches upon the outside of thecontinuous ring Gr. When the second split ring side of the saidcontinuous ring G.

The expansion of the split ring E and of'the split ring I isaccomplished by devices which, as provided for the expansion of thesplit ring E, are duplicated for the expansion of the split ring I andwhich are constructed for operation as more fully shown in the detailview Fig. 7. It will be seen that the split of the ring is transverse,that in one'of 99 I is expanded, it grips or clutches upon the inthesurfaces of the split is a semicylindric seat or socket f while theopposite surface g of the split is flat or substantially so. Placed inthe socket f is an axially-movable bolt h, which in its cross-section ismore or less semicylindric, so that when the bolt is turned to oneposition its flat surface is flush with the surfaces if at the sides ofthe socket, so that the two surfaces of the split may come together bythe elasticity of the ring itself, so that the latter is contracted.When, however, the bolt is turned axially to the position shown in Fig.7 a portion of the bolt is projected outward beyond the socketed surfaceof the split and acting upon the opposite surface of the split spreadsthe latter and expands the ring. The bolt receives its axial movement bymeans of an arm m at one end thereof. This arm (not shown in Fig. 7) isrepresented in its connection with the bolt in Figs. 1 and 6. Said armis actuated by meansherein presently to be described. As above remarked,the said mechanism for expanding one of the said split rings isduplicated for expanding the other; but for convenience of designationthe reference-letters for said mechanism for the ringI are f, g, it, andm, respectively, instead of f 9 lb, and m, which latter indicatecorresponding parts of the mechanism for the ring E. The arm m, which byits motion gives the turning or axial movement to the bolt lb of thesplit ring E, is actuated by a sliding cam K, which is loose on theshaft A and which receives its movement along said shaft from a slidingcollar L, this latter being connected with the cam K by means of a keya, which works in a longitudinal groove 12. in the shaft A. In thecylindric surface of this collar is a circumferential groove (L in whichis a loose ring L from which at opposite parts of its circumferenceproject studs If, as shown more fully in Fig. 5. Upon one end of the keyn is a spur n which works in an internal annular groove 12 in thesliding collar L and at the other end has a similar spur s, which worksin a similar internal groove .9 in the cam K, as shown in the detailview Fig. 5, so that a sliding movement being given to the collar a likemovement is given to the cam, and the latter, pushing the arm m of thebolt it aside, gives the requisite turning movement to the bolt toexpand the ring E. Slidable upon the shaft A is a second cam M, the hub7* of which is circumferentially grooved, as at 1' and in this groove isfitted a loose ring P, which at opposite parts of its circumference hasradially-projecting studs u. The inward movement of this second cam Mactuates the arm m of the bolt of the split ring I in the same mannerthat the cam K actuates the similar arm at of the bolt of the split ringE,-with a corresponding result in expanding the ring I. The requisitesimultaneous but differential motions of the two cams is provided for bycam-slots v and win a longitudinally-movable frame R, the studs 7/ ofthe ring L of the collar L working in the slots 1; and those of the ringin the hub 7- working in the slots w of the said frame. This frameslides in suitable fixed bearings c and 0 and may on occasion receiveits longitudinal movement from any suitable device as, for example, ahandle d. (Shown in Figs. 1 and 2.)

To provide for the contraction of outer and fixed split ring F, its endsat its split are provided with outwardly-turned lugs a, as shown in Fig.3. To one of these is attached a clamp f which laps over the lug at theopposite side of the split. In the last-indicated end of the clamp is asemicylindric seat in which is placed asemicylindric boltf, to one endof which is provided an arm g, the free end of which rests against aninclined plane or camlike surface [1, on the frame R. The action of theinclined plane if on the arm g gives an axial movement to the bolt f,which brings its greater diameter between the side of the clamp and theouter side of the adjacent lug e, and thereby brings the opposite sidesof the split toward each other to contract the ring.

The operation of the apparatus is as follows, the frame R being inamidway position with the parts actuated thereby inoperative for thetime being, with the pulley loose to move in either direction upon theshaft A: Assuming the frame R to be moved in an upward direction, theinclination of the lower part of the slot '0 slides inward the collar L,thereby, through the key n, moving inward the cam K against the arm m ofthe bolt It and turning the latter expands the split E in the mannerhereinbefore explained to grip the inner surface of the flange a of theinternal gear D, thereby insuring its rotation with the shaft A.Simultaneous with this the action of the inclined plane, which in itsoperation is substantially a cam 12, upon the free end of the lever g,turns the bolt f, thereby contracting the split ring F and,clutching thesame to the continuous ring G, renders the latter non-revoluble, so thatthe pinions g while revolving on their own axes are not carried aroundwith the shaft. As a consequence,the rotation of the internal gear Drotates the intermediate motion-transmitting devicesthepinions gand thusacting upon the gear I), which is fast to the hub a of the pulley C,revolves the same in a direction opposite to that of the motion of theshaft, as indicated by the curved arrows in Fig. 1. It will be noticedthat during the upward movement of the frame R, just herein described,the lower part of the slot w of the frame is idle so far as concerns anytransmission of motion to the cam M. It will also be observed that thearms by which the several semicylindric bolts are axially turned arethemselves synchronously operated by the several cams which arethemselves duly actuated frame R is reversed, with the result of firstbringing the parts again to the position shown in Fig. 1, in which thepulley is free or loose upon the shaft. The continued movement of theframe by bringing the upper portions of the slots a; and w into playupon the studs 6 and u of the collar L and hub r, respectively, slidethe cams K and M inward. The inward movement of the cam K actuates thearm on of the bolt h of the split ring E and expand-- ing the lattergrips the same fast to the flange 0 of the internal gear D, therebymaking the latter fast to the shaft. Meanwhile the inward movement ofthe cam M actuates the arm on of the bolt k to expand the split ring Ito grip upon the continuous ring Gr, which carries the intermediategears g. As the split ring I'is fast by the pin a to the internal gear Dthe intermediate pinions carried by the ring G are also gripped to theshaft. The mechanism which (in the first-described operation torevolvethe pulley in a direction opposite that of the shaft) being thusblocked serves merely to make the pulley for the time being fast to theshaft, so that the pulley rotates with and in the same direction as theshaft.

What I claim as my invention is- 1. The combination with a revolubleshaft, a

hollow pulley loose thereon, a pinion fast to the pulley within thesame, aflanged internal gear loose on the shaft, a split ring fast tothe shaft and placed within the flange of the internal gear, means forexpanding the said split ring to clutch the inside of the said flange torotate the internal gear with the shaft, and a split ring fast to theinternal gear and revoluble therewith, of a continuous ring outside ofand concentric with said split ring, means for expanding said splitringto clutch the inside of the continuous ring, gears carried by thecontinuous ring and interposed between the internal gear and the pinionwhich is fast to the pulley and within the same, anon-revoluble splitring outside of the continuous ring and means for contracting thenon-revoluble split ring to clutch the outer surface of the continuousring, the whole coordinated for joint use and operation, as described.

2. The combination with a revoluble shaft, a hollow pulley loosethereon, apinion fast to the pulley within the same, a flanged internalgear loose on the shaft, a split ring fast to the shaft and placedwithin the flange of the internal gear, and devices for expanding thesaid split ring to clutch the inside of the said flange, of a cam foractuating said devices, a split ring fast to the internal gear andrevoluble therewith, a continuous ring outside of and concentric withsaid split ring, devices for expanding said split ring, a cam foractuating said devices, gears carried by the continuous ring andinterposed between the internal gear and the pinion which is fast to thepulley and within the same, a non-revoluble split ring outside of thecontinuous ring, and means for contracting the non-revoluble split ringto clutch the outer surface of the continuous ring, all as and for thepurpose herein set forth.

3. The combination with a revoluble shaft, a hollow pulley loosethereon, a pinion fast to the pulley within the same, a flanged internalgear loose on the shaft, a split ring fast to the shaft and placedwithin the flange of the internal gear and devices for expanding thesaid split ring to clutch the inside of said flange, of a cam slidableupon the shaft to operate saiddevices, a split ring fast to the internalgear and revoluble therewith, a continuous ring outside of andconcentric with said split ring, devices for expanding said split ring,a cam slidable upon the shaft for operating said devices, mechanism foroperating said cam synchronously with the cam just hereinbeforementioned, gears carried by the continous ring and interposed betweenthe internal gear and the pinion which is fast to the pulley within thesame, a non-revoluble split ring outside of the continuous ring andmeans for contracting said non-revoluble split ring upon the outside ofthe continuous ring, all substantially as and for the purpose specified.

4. The combination with a revoluble shaft, a hollow pulley loosethereon, a pinion fast to the pulley within the same, a flanged internalgear loose on the shaft, a split ring fast to the shaft, placed withinthe flange of the internal gear and having in one of the surfaces of itssplit, asemicylindric seat, a semicylindric bolt placed in said seat,and an arm provided to said bolt to turn the same to spread the splitand expand the said split ring to clutch the inside of said flange, of acam slidable upon the shaft to actuate the arm of the said bolt, a splitring fast to the internal gear and revoluble therewith, a continuousring outside of and concentric with said split ring, devices forexpanding said split ring, a cam slidable upon the shaft for operatingsaid devices, mechanism for operating said devices synchronously withthe axial movement of the bolt in the split of the split ring which iswithin the flange of the internal gear, gears carried by the continuousring and interposed between the internal gear and the pinion which isfast to the pulley within the same, a non-revoluble split ring outsideof the continuous. ring, and means for contracting said non revolublesplit ring against the outside of the continuous ring, all substantiallyas and for the purpose set forth.

5. The combination with a revoluble shaft, a

tate the internal gear with the shaft, a split ring fast to the internalgear, revoluble therewith and having a semicylindric seat in one side ofits split, a continuous ring outside of and concentric with said splitring, and a semicylindric bolt placed in the seat of the said split ringand having an arm whereby it may be turned to spread the split of saidring to clutch the inside of the continuous ring, of a cam slidable onthe shaft for actuating said arm, gears carried by the continuous ringand interposed between the internal gear and the pinion which is fast tothe pulley Within the same, a non-revoluble split ring outside of thecontinuous ring, and means for contracting the non-revoluble split ringto clutch the outer surface of the'continuous ring, all substantially asand for the purpose herein set forth. I

6. The combination with a revoluble shaft,a hollow pulley loose thereon,a pinion fast to the pulley within the same, a flanged internal gearloose on the shaft, a split ring fast to the shaft placed within theflange of the internal gear, devices for expanding the said split ringto clutch the inside of said flange and a cam slidable upon the shaft tooperate said devices, of a split ring fast to the internal gear andrevoluble therewith, a continuous ringoutside of and concentric withsaid split ring, devices for expanding said split ring, a cam slidableupon the shaft for operating said devices, mechanism for operating saidcam synchronously with the cam just hereinbefore mentioned, gearscarried by the continuous ring and interposed between the internal gearand the pinion which is fast to the pulley within the same, anon-revoluble split ring placed outside of the continuous ring andhaving outwardly-turned lugs at opposite sides of its split, aclamphaving a semicylindric seat and placed over said lugs, asemicylindric bolt placed in said seat and having an arm by which it maybe axially turned, and means for actuating said arm to thus operate thebolt to contract said non-revoluble split ring upon the outside of thecontinuous ring, all substantially as and for the purpose set forth.

7 The combination with a revoluble shaft,a hollow pulley loose thereon,a pinion fast to the pulley within the same, aflanged, internal gearloose on the shaft, a split ring fast to the shaft placed within theflange of the internal gear, and having in one of thesurfaces of itssplit a semicylindric seat, asemicylindric bolt placed in said seat, andan arm provided to said bolt to turn the same to spread the said split,of a split ring fast to the internal gear and having in one of thesurfaces of its split asemicylindric seat, a semicylindric bolt placedin said seat, and having an arm whereby it may be turned to spread thesaid split, a continuous ring outside of and concentric with said splitring, gears carried by said continuous ring and interposed between theinternal gear and the pinion which is fast to the pulley within thesame, a non-revoluble split ring placed outside of the continuous ringand having outwardly-turned lugs, at opposite sides of the split, aclamp having a semicylindric seat and connecting said lugs, asemicylindric ,bolt placed in said seat and having an arm whereby it maybe turned to contract upon the continuous ring to clutch the same, andsynchronously-operated cams for operating the arms of the respectivebolts, substantially as and for the purpose set forth.

WILLIAM H. KESSLER.

Witnesses:

JAMES A. WHITNEY, GEO. R. HALL.

